High Definition Television. A television format with higher definition than SDTV. While DTV at 625 (576) or 525 (480) lines is usually superior to analog PAL and NTSC, it is generally accepted that 720-line and upward is HD. This also has a picture aspect ratio of 16:9.
While there are many picture HDTV formats there is a consensus that 1920 x 1080 is a practical standard for global exchange of television material; a common image format. Many productions are made in this format.